Patent application number | Description | Published |
20120088539 | METHOD AND APPARATUS FOR SELECTING CELL TO INCREASE TRANSMISSION CAPACITY IN WIRELESS COMMUNICATION SYSTEM - An apparatus is configured to perform a method for selecting a cell to increase transmission capacity in a wireless communication system. A Mobile Station (MS) can select a cell in a heterogeneous network system. The MS can receive a loading indicator for each of a plurality of Base Stations (BS); measure signal strength information for each of the BSs; and select one of the BSs using the loading indicator and the signal strength information. Therefore, the transmission efficiency of the system can be increased. | 04-12-2012 |
20120093107 | APPARATUS AND METHOD FOR DYNAMICALLY ALLOCATING RESOURCES IN COMMUNICATION SYSTEM - An apparatus and method dynamically allocate resources in a communication system. An operation method of a base station (BS) dynamically allocates resources in a network associated with a first communication system and a second communication system. The method includes, in a start position of a subframe within a frame of the second communication system, generating information on a following subframe for the second communication system's subframe existing in the start position, in a frame structure that supports the coexistence of the first communication system and the second communication system. The method also includes inserting the generated information on the following subframe into a control signal transmitted through a predefined region within the second communication system's subframe existing in the start position and transmitting the control signal to a mobile station associated with the second communication system. | 04-19-2012 |
20120115535 | METHOD AND APPARATUS FOR UPLINK POWER CONTROL USING RANGING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for uplink power control using a ranging signal in a wireless communication system are provided. The method includes transmitting ranging channel information to a pico Base Station (BS), receiving power control information on a macro terminal from the pico BS, controlling a transmit power strength for the macro terminal based on the power control information, and instructing the macro terminal to control a transmit power to the controlled strength. | 05-10-2012 |
20120178454 | METHOD AND APPARATUS FOR OBTAINING IDENTIFIER OF SMALL CELL IN WIRELESS COMMUNICATION SYSTEM HAVING HIERARCHICAL CELL STRUCTURE - A method and an apparatus for obtaining a small cell identifier in a wireless communication system having a hierarchical cell structure are provided. The method includes obtaining a small cell identifier of a terminal in a wireless communication system of a hierarchical cell structure, transmitting resource information allocated for a Random Access Channel (RACH) of a terminal to a small base station, receiving state information regarding the RACH of the terminal from the small base station, determining at least one small base station adjacent to the terminal using the state information regarding the RACH, and transmitting cell IDentifier (ID) information of the determined small base station to the terminal. | 07-12-2012 |
20120178468 | METHOD AND APPARATUS FOR SUPPORTING HIGH-SPEED MOBILE TERMINALS IN A DISTRIBUTED ANTENNA SYSTEM - A method and apparatus for supporting a high-speed mobile terminal in a distributed antenna system. The method includes acquiring information on a position and a speed of each terminal of a plurality of terminals, mapping the plurality of terminals to at least one or more terminal groups based on at least one or more of the position or the speed of the terminal, determining a service end time point at a serving antenna node and a service start time point at a target antenna node, using position and speed information associated with the terminal group, and switching an antenna node for the terminal group, according to the service end time point at the serving antenna node and the service start time point at the target antenna node. | 07-12-2012 |
20120183028 | APPARATUS AND METHOD FOR RANGING IN DISTRIBUTED ANTENNA SYSTEM - An apparatus and a method for ranging in a distributed antenna system are provided. A method for an operation of a Mobile Station (MS) in a distributed antenna system includes obtaining per-group ranging code configuration information indicating a ranging code allocation for each antenna port group, determining an antenna port group that the MS belongs to, and performing a ranging procedure by one of a plurality of ranging codes allocated to the antenna port group that the MS belongs to. | 07-19-2012 |
20120190365 | METHOD AND APPARATUS FOR SUPPORTING HANDOVER IN HETEROGENEOUS NETWORK - A method for operating a terminal for supporting a handover in a heterogeneous network is provided. The method includes measuring received signal strength from a target small base station, so that a Signal-to-Noise Ratio (SNR) is estimated, when the SNR of the target small base station that considers a biased value for range expansion is greater than an SNR of a serving macro base station, determining whether an SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than a threshold, and when the SNR of the target small base station that does not consider the biased value for the range expansion is equal to or less than the threshold, transmitting indication information, informing that a low SNR is expected when the terminal performs a handover to the target small base station, to the serving macro base station. | 07-26-2012 |
20120196561 | METHOD AND APPARATUS FOR SUPPORTING MOBILE STATION DISCONNECTED FROM A BASE STATION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus support a Mobile Station (MS) located in a collapsed cell area to be disconnected from a Base Station (BS) in a wireless communication system. A method of an MS for supporting an disconnected MS disconnected from a BS in a wireless communication system includes receiving a rescue signal from the disconnected MS; collecting information to determine a support MS for the disconnected MS; and transmitting the collected information to a serving BS. | 08-02-2012 |
20120213171 | APPARATUS AND METHOD FOR INITIAL ACCESS IN WIRELESS COMMUNICATION SYSTEM WITH HIERARCHICAL CELL STRUCTURE - An initial access procedure in a wireless communication of a hierarchical cell structure includes operations of a mobile station (MS). The operations of the MS include transmitting an initial access message; obtaining information of a small cell Base Station (BS) which receives the initial access message, from a response message received from a macro BS; attempting to decode a reference channel transmitted by the small cell BS; and when successfully decoding the reference channel, setting a downlink channel with the small cell BS. | 08-23-2012 |
20120231830 | METHOD AND APPARATUS FOR INITIAL RANGING IN WIRELESS COMMUNICATION SYSTEM INCLUDING HETEROGENEOUS NETWORK - An apparatus and method for initial ranging in a wireless communication system including a heterogeneous network. An operation of a terminal includes selecting a serving cell considering a biased value of a base station applying range expansion. The operation also includes receiving ranging code classification information and threshold information associated with the serving cell. The operation further includes, if a channel quality with the serving cell is less than the threshold, selecting one a plurality of poor-expected-ranging codes indicated by the ranging code classification information, and performing initial ranging using the selected poor-expected-ranging code. | 09-13-2012 |
20120320776 | METHOD AND APPARATUS FOR OBTAINING SYNCHRONIZATION FOR COMMUNICATION BETWEEN DEVICES - A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point. | 12-20-2012 |
20130021952 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING INFORMATION FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM - A method and a Base Station (BS) of transmitting information for Random Access (RA) by a base station in a wireless communication system are provided. The BS generates RA information for beam alignment between the base station and each of a plurality of mobile terminals based on a number of reception beam forming patterns of the base station used for each of one or more RA channels and broadcasts the RA information to the plurality of mobile terminals. The RA information comprises information related to the number of reception beam forming patterns of the base station used for each of the one or more RA channels. | 01-24-2013 |
20130072243 | METHOD AND APPARATUS FOR BEAM ALLOCATION IN WIRELESS COMMUNICATION SYSTEM - A beam allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes transmitting a reference signal to a Mobile Station (MS) using a plurality of downlink transmit (Tx) beams, receiving information of a plurality of candidate downlink Tx beams determined by the MS in response to the received reference signal, selecting at least one downlink Tx beam from the plurality of candidate downlink Tx beams according to a predefined rule, generating control information for burst transmission, comprising the selected at least one downlink Tx beam information, transmitting the control information to the MS using the selected at least one downlink Tx beam, and transmitting a data burst based on Tx beam information included in the control information. | 03-21-2013 |
20130072244 | APPARATUS AND METHOD FOR BEAM SELECTING IN BEAMFORMED WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for reducing delay during beam alignment in a beamformed wireless communication system are provided. A method for selecting a beam pattern in a Base Station (BS) includes determining whether a direction finding signal is received through each time interval of a direction finding channel, transmitting information of whether the direction finding signal is received with respect to each time interval of the direction finding channel, changing a receive beam pattern and receiving a random access signal from a Mobile Station (MS) with at least one transmit beam pattern over a random access channel, and selecting one of transmit beam patterns of the MS and one of receive beam patterns of the BS according to the random access signal. | 03-21-2013 |
20130072247 | APPARATUS AND METHOD FOR OPERATING MULTIPLE BEAMFORMING TRANSCEIVER IN WIRELESS COMMUNICATION SYSTEM - A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics. | 03-21-2013 |
20130107831 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN A NEAR FIELD COMMUNICATION SYSTEM | 05-02-2013 |
20130172002 | BEAMFORMING METHOD AND APPARATUS FOR ACQUIRING TRANSMISSION BEAM DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM - A data transmission method for a base station to acquire transmission beam diversity in a wireless communication system is provided. The data transmission method includes selecting at least two transmission beams to be used for data transmission from among multiple transmission beams corresponding to transmission beam information, if receiving the transmission beam information regarding the multiple transmission beams from a terminal, and transmitting data encoded with a predetermined orthogonalization code to the terminal via the selected at least two transmission beams. | 07-04-2013 |
20130258885 | METHOD AND APPARATUS FOR TRANSMITTING BEAM INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and a mobile station of transmitting beam information by a mobile station in a wireless communication system are provided. The mobile station determines whether a particular a particular event according to communication with a base station has occurred, and transmits information on at least one DownLink (DL) transmission beam among N number of DL transmission beams to the base station using a contention-based feedback channel according to a result of the determination. | 10-03-2013 |
20130301567 | SCHEME FOR PERFORMING BEAMFORMING IN COMMUNICATION SYSTEM - A method of performing beamforming in a base station is provided. The method includes receiving random access channel signals transmitted in one or more transmit beams from a terminal, using one or more receive beams, determining at least one best transmit beam from the one or more transmit beams and at least one best receive beam from the one or more receive beams, and transmitting information about the best transmit beam and the best receive beam to the terminal. | 11-14-2013 |
20130308569 | COORDINATED COMMUNICATION IN COMMUNICATION SYSTEM - A method of supporting communication of a terminal in a first base station of a beamforming system is provided. The method includes determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell, and transmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations. | 11-21-2013 |
20140004897 | APPARATUS AND METHOD FOR OPERATING RESOURCES IN COMMUNICATION SYSTEM | 01-02-2014 |
20140004898 | METHOD AND APPARATUS FOR BEAMFORMING | 01-02-2014 |
20140016584 | APPARATUS AND METHOD FOR CONFIGURING WIRELESS BACK HAUL LINK IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for configuring a wireless backhaul link by a Mobile Station (MS) in a wireless communication system. The method includes acquiring System Information (SI) for each of an old Base Station (BS) which transmits a first code and a new BS which transmits a second code. The method includes transmitting a message which reports the SI for the new BS to the old BS. The method includes receiving a message indicating that the new BS discards the second code and uses the first code from the old BS, wherein the first code is a code indicating that a related BS is a BS which has been already deployed, and wherein the second code is a code indicating that a related BS is a BS which is newly deployed. | 01-16-2014 |
20140086217 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BROADCAST CHANNEL IN CELLULAR COMMUNICATION SYSTEM - Provided is a method and apparatus for transmitting and receiving a Broadcast Channel (BCH) in a cellular communication system. The method for transmitting a BCH in a cellular communication system includes repeating symbols comprising information about the BCH, code-covering the repeated symbols with codes selected from a previously given code set, subcarrier-mapping the code-covered symbols, and transmitting the subcarrier-mapped symbols in one frame by using different beams corresponding to the selected codes. The codes are selected based on a number of repetitions, a cell identifier, and a beam index. | 03-27-2014 |
20140112269 | APPARATUS AND METHOD FOR BASE STATION COOPERATIVE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - A Base Station (BS) cooperative communication method in a wireless communication system is provided. The BS cooperative communication method includes measuring signal quality of one or more neighboring BSs, comparing a number of downlink beams available for communication between a serving BS and a Mobile Station (MS) with a reference value, determining not to involve the one or more neighboring BSs in BS cooperative communication for the MS when the number of downlink beams is equal to or larger than the reference value, comparing signal measurements of the one or more neighboring BSs with a first threshold when the number of downlink beams is smaller than the reference value, and determining to involve one or more neighboring BSs having a signal measurement value larger than the first threshold in the BS cooperative communication for the MS. | 04-24-2014 |
20140148182 | METHOD AND APPARATUS FOR ALLOCATING INTERFERENCE CANCELLATION CODE FOR INTER-BASE STATION COORDINATED COMMUNICATION IN RADIO COMMUNICATION SYSTEM - The present disclosure provides a method for allocating a code for inter-Base Station (BS) coordinated communications in a radio communication system. The method includes grouping terminals, at least more than a predetermined number of whose transmit and receive beams indicated by the terminals' respective favorite beam configuration information correspond to each other, in a same group; and allocating unique codes to terminals in the same group and sending information regarding the allocated code to each of the terminals. | 05-29-2014 |
20140376444 | MULTICAST SERVICE METHOD AND APPARATUS IN MOBILE COMMUNICATION SYSTEM - A method of providing a multicast service in a mobile communication system includes dividing original multicast data into a plurality of multicast data to generate a plurality of multicast streams having different data rates and transmitting a first transmission frame including the plurality of multicast streams to a plurality of user equipments; receiving a report on a data rate corresponding to an unreceived multicast stream among the plurality of multicast streams from one or more user equipments among the plurality of user equipments; and transmitting a second transmission frame including the unreceived multicast stream to the plurality of user equipments including the one or more user equipments. | 12-25-2014 |
20150085854 | METHOD AND APPARATUS FOR OBTAINING SYNCHRONIZATION FOR COMMUNICATION BETWEEN DEVICES - A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point. | 03-26-2015 |